User's Information
To Start the Heating System
Heating Cycle Operation
Your unit's heating system has a solid-state electronic
ignition control that lights the furnace burners each time the
thermostat calls for heat. At the end of each heating cycle, the
furnace burners are extinguished. This type of system is
called Direct Spark Ignition (DSI).
A normal heating cycle begins when the air temperature in
your home drops below the thermostat setting. The thermo-
stat then energizes the heating electrical circuit that starts
and controls the furnace burners. Shortly after the burners
ignite, the indoor fan starts and circulates warm air through
your home.
When the air temperature rises above the thermostat setting,
the thermostat de-energizes the heating electrical circuit,
which in turn, extinguishes the furnace burners. The indoor
fan continues to circulate warm air until the remaining heat
is removed from the unit's heat exchanger.
Safety Controls
Your unit is equipped with an automatic reset safety limit
control to prevent overheating. When this control opens, it
shuts down the heating electrical circuit until the unit cools
down sufficiently. Inadequate airflow may cause the unit to
cycle on and off as the limit control trips and automatically
resets. If you suspect that the unit is cycling on its limit
control, immediately contact a service technician for instruc-
tions.
If the unit is unable to exhaust combustion by-products
properly, due to a blocked flue hood or other blockage, a
pressure switch safety device will prohibit the unit from
operating. The cause must be investigated by a qualified
service technician.
If flames from the burner are not properly drawn into the heat
exchanger, a Flame Rollout Protection Control will open
causing the furnace to shut off. The cause must be investi-
gated by a qualified service technician.
Heating System Start Up
Never attempt to manually light the burner. This unit is
equipped with an ignition device which automatically lights
the burners.
Your unit has an automatic ignition system. This feature
makes it easy to start the heating cycle at the beginning of
the heating season.
In order for this unit to operate properly and safely, the
furnace needs air for both combustion and ventilation.
Accordingly, observe the area in which the furnace is installed.
Check to make sure that all the air openings are unob-
structed. Likewise, insure that the spacing around the furnace
itself is not blocked or obstructed.
1. Set the thermostat to lowest setting.
2. Turn offall electric power to the unit if service is to be
performed.
3. Remove the access panel that is identified as CONTROL/
HEAT.
4. Turn gas control off by moving the toggle switch to OFF.
See Figure 2 on page 5.
5. Wait five (5) minutes to clear any gas. If you then smell
gas, STOP!, for your safety follow the "What To Do If You
Smell Gas" instructions on the front page. If you do not
smell gas, go to next step.
6. Turn gas on by moving the toggle switch to ON.
7. Replace the panel that you removed in Step 3 and make
sure all other unit panels are securely in place.
8. Turn on all electrical power to the unit.
9. Set thermostat to desired temperature and the fan to ON.
The unit will now operate automatically.
10.If the unit will not operate, perform the steps in the
following section, "To Turn OffGas To Unit" (under
Heating System Shutdown) and call your service techni-
cian or gas supplier.
NOTE: The unit is to be adjusted to obtain a temp air rise that is
specified on the nameplate.
Heating System Shutdown
To shut down the heating system for brief periods of time,
simply adjust the thermostat selector switch to the OFF
position.
If you need to turn the gas offto the unit, follow the steps
below:
To Turn Off Gas To Unit
1. Set the thermostat to lowest setting.
2. Turn offall electric power to the unit if service is to be
performed.
3. Remove the access panel that is identified as CONTROL/
HEAT.
4. Turn gas control off by moving the toggle switch to OFF.
See Figure 2 on page 5.
5. Replace the panel you removed in Step 3.
Ifyou shutdown your heating system during the cold
weather months, precautions must be taken to prevent
freeze-up of all water pipes and water receptacles. When-
ever your home or building is to be vacant, arrange to have
someone inspect your structure for proper temperature. This is
very important in below freezing weather. If for any reason
your furnace should fail to operate, damage such as frozen
water pipes could result.
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